Bromophenol Blue, Reagent, ACS

Molecular Formula:
C19H10Br4O5S 6
CAS Number:
Molecular Weight:
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Product Overview

Bromophenol Blue, Reagent, ACS

Molecular Formula:C19H10Br4O5S

CAS Number:115-39-9
Molecular Weight:669.96

Bromophenol Blue, Reagent, ACS is used as an acid-base indicator and a gel electrophoresis color marker. As an acid-base indicator its useful range lies between pH 3.0 and 4.6. At pH 3.0 it is blue and at pH 4.6 it changes to yellow. The reaction is reversible. As an ACS grade quality reagent, its chemical specifications are the de facto standards for chemicals used in many high-purity applications and typically designate the highest quality chemical available for laboratory use. ScienceLab Reagent ACS grade products meet the toughest regulatory standards for quality and purity.

Synonyms: 3,3,5,5-Tetrabromophenolsulfonphthalein

Appearance Light pink powder
Solubility Clear solution (0.1% in EtOH)
Visual Transition Range pH 3.1 (Greenish yellow) - pH 4.6 (Blue violet)
Dye Content 98.5% (By spectrophotometry)
UV Absorption (pH 3.1) at λmax. 437.4 nm: 362(pH 4.6) at λmax. 591.2 nm: 985
Loss on Drying 0.81% (110 °C, 1h)